Tetra Whisper Bio-Bag Large Filter Cartridges for Aquariums, 3 Count | Ready to Use, Fits Tetra Whisper Fish Tank Filter 10-30 Gal, 20-40 Gal, PF-20, 30, 40, 60, IQ 20, 30, 45, 60, Replace Monthly

These Tetra Whisper Bio-Bag cartridges make filter maintenance simple and effective. They come ready to use—just slide into your filter and you’re good to go. The activated carbon does a great job removing odors and discoloration, and the floss traps debris to keep water clean. Perfect for large tanks, and the 3-pack offers good value. If you want hassle-free aquarium upkeep, these cartridges are a reliable choice.

These come preassembled and do a great job of keeping a 100 gallon stock tank for an 8 year old peninsula cooter. Turtles are notoriously dirty and it’s not easy to keep his tank clean. Rinse well prior to use! I have 2 filters and I change one of the filters weekly, alternating and rinsing the one I don’t change, very well. These filters make it so much easier to keep his tank crystal clear!!

Works good

Perfect fit

Love this product but dinging it a star bc Amazon will absolutely never ship this safely. They can waste boxes on indestructible things and then throw this fragile item in a shipping bag so all you receive is a bag coated in carbon and no usable product. Stopped buying online.

I’ve been using these Tetra Whisper Bio-Bag Filter Cartridges (Large) for my 30-gallon tank, and they really do the heavy lifting when it comes to keeping the environment healthy for my tetras and snails. Why They Work True "Ready to Use": These come fully assembled. As someone who juggles a busy work schedule and a full house, not having to mess with loose carbon and clips is a huge time-saver. Water Clarity: The dual-sided mesh is surprisingly dense. It catches all the fine debris, and the integrated carbon does a great job of neutralizing those typical "fish tank" odors. Easy Identification: The blue color-coding is a nice touch. It makes it nearly impossible to grab the wrong size at the store. A Note on My Own "User Error" If you’re noticing that your filter is being louder than a "Whisper" or if the flow seems weak, check your water level! I made the mistake of letting the water line get a bit too low. Because the water had to "fall" further from the filter intake, it was creating unnecessary splashing and making the pump work much harder than it needed to. Once I topped off the tank to the appropriate level, the Bio-Bag started performing perfectly again, and the silence returned. Pro Tip: If you have a busy household or a lid that allows for some evaporation, keep an eye on that water line to ensure these cartridges can do their job efficiently. Final Verdict These are reliable, convenient, and effective. I change mine about once a month, and the water stays crystal clear. Just make sure your tank is topped off so the filter can actually do its thing!

Product is done. It was in an envelope rather than a box.

These are cheaper than at the pet store very satisfied with them. Good value you have purchased many times.

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Sirve como repuesto, solo es remplazar el cartucho cuando esté se desgasta. Funciona bien pero creo que modificaré el filtro ya que el agua no se ve tan cristalina como quisiera pero creo que es problema del tanque y no del filtro en si, lo enjuague antes de usar pero aún así soltó con el uso soltó algunas partículas de carbón activado pero es sencillo retirarlas. Si se necesitase lo volvería a comprar.

Excellent produit

llego a tiempo y cumplen su funcion

Quick shipping. Exactly what I needed and for a great price! Thanks